Seldons
ft lbs to nm
1 foot-pound = 1.35582 newton-meters.
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How do you convert foot-pounds to newton-meters?
Use this formula. It is exact — these units are defined by international agreement, not measured.
N·m = ft·lb × 1.35581795
Example: 10 ft·lb × 1.35581795 = 13.5582 N·m.
ft lbs to nm conversion table
Common values, rounded to six significant figures.
| ft·lb | N·m |
|---|---|
| 1 ft·lb | 1.35582 N·m |
| 5 ft·lb | 6.77909 N·m |
| 10 ft·lb | 13.5582 N·m |
| 15 ft·lb | 20.3373 N·m |
| 20 ft·lb | 27.1164 N·m |
| 25 ft·lb | 33.8954 N·m |
| 30 ft·lb | 40.6745 N·m |
| 40 ft·lb | 54.2327 N·m |
| 50 ft·lb | 67.7909 N·m |
| 60 ft·lb | 81.3491 N·m |
| 75 ft·lb | 101.686 N·m |
| 80 ft·lb | 108.465 N·m |
| 90 ft·lb | 122.024 N·m |
| 100 ft·lb | 135.582 N·m |
| 120 ft·lb | 162.698 N·m |
| 150 ft·lb | 203.373 N·m |
Torque specifications are the reason: American service manuals give bolt torque in pound-feet while the wrench, the car and the rest of the manual are metric. One pound-foot is 1.3558 N·m. Note that the same words are used for energy — a torque figure and an energy figure are not interchangeable even when the units read alike.
Values worth remembering
These come up often enough that knowing them saves a lookup.
- 80 ft·lb = 108.465 N·ma typical car wheel nut
- 18 ft·lb = 24.4047 N·ma bicycle crank bolt
Questions people ask
How many newton-meters is 1 foot-pound?
1 foot-pound is 1.35582 newton-meters.
How many foot-pounds is 1 newton-meter?
1 newton-meter is 0.737562 foot-pounds.
How do you convert foot-pounds to newton-meters in your head?
Use × 1.36. That lands within a percent or so of the exact figure, which is close enough for packing, shipping estimates and shopping — use the calculator when the number has to be right.
Is the foot-pound to newton-meter conversion exact?
Yes. The relationship is exact by international agreement, so 1.35581795 is a definition rather than a measurement. Rounding in the answer comes from display, not from the conversion.